Are you going to do an FIR analysis or are you going to assume a shape to the hemodynamic response function? If you are assuming the shape (the usual), then the answer to both of your questions is no

On 2/14/19 8:31 AM, Rockhill, Alexander P. wrote:

Hello Freesurfer experts,

I am working on designing a task using opt seq to determine the optimal ITI and I had a question about task timing. Does it matter if the stimulus period during a task starts at the start of a TR or that the stimulus presentation lasts uninterrupted an amount of time that is an integer multiple the TR?

Thanks in advance for any help.

Best,

Alex

Translational NeuroEngineering Laboratory Division of Neurotherapeutics, Department of Psychiatry Massachusetts General Hospital, Martinos Center 149 13th St Charlestown #2301, Boston, MA 02129

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